Hobby vs. professional

• history: PCB is coming from the hobby side
• challenge: how to support both?

Goal: balance.

Examples on hot topics

• data model
  • padstacks vs. special case pins/pads
  • "zone"/"ground plane" vs. polygon
  • per object properties vs. globally enforced parameter
• automation vs. GUI
• backward and forward compatibility in file formats
• self contained files; example: ttf; calculated vs. stored features